If I had to have someone operate and suture a ruptured artery inside me after a terrible accident or something - I would rather a human doctor be able to do it. Also, a human being would be better at doing that in a non clinical environment (such as road side assistance at a vehicle accident scene etc.).
Also, as the son of a respected doctor, I see other aspect of 'doctoring' that extend to far beyond technical or diagnostic skills. Hardly a day went by when we were out in public when a former patient of his would approach us and thank him for safely delivering their child or saving their lives. I don't think that an email thanking AutoDocBot3000 v2.33 for diagnosis & drug dispensation # 288374 would have the same impact.
> If doctors are replaced it's because medical care has improved beyond their capabilities.
Don't bet on it. Software is much cheaper, so when cost of resulting mistakes + cost of software < cost of doctors and their mistakes, some hospitals will do the switch.